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Archimedes was a mathematician and
inventor from ancient Greece. He discovered the relation between the surface
and volume of a sphere and its circumscribing cyclinder (he had discovered
pi). He then formulated a hydrostatic principle based on that mathmatical
relationship called Archimedes' principle. He inventing the Archimedes
screw - a screw-shaped machine or hydraulic screw that raised water from
a lower to a higher level. Archimedes also invented the catupult, the lever,
the compound pulley, and the burning mirror (a system of mirrors that burned
the boots and ships of invading armies by focusing the sun's rays). Although
Archimedes is credited with inventing the screw in the 3rd century BC,
his screw was not like today's screw fastener
but actually two other screw-type devices.

ArchimedesCollection of various historical
documents and writings on the theories of the Sicilian mathematician and
inventor.